diff options
| -rw-r--r-- | include/sound/soc-dapm.h | 1 | ||||
| -rw-r--r-- | sound/soc/soc-dapm.c | 161 |
2 files changed, 154 insertions, 8 deletions
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index 43ca1656dab4..89823cfe6f04 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -569,6 +569,7 @@ struct snd_soc_dapm_widget { struct list_head sinks; /* used during DAPM updates */ + struct list_head work_list; struct list_head power_list; struct list_head dirty; int inputs; diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 8e26c2bc7fdf..6bf2c9795df2 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -159,6 +159,116 @@ static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason) } } +/* + * dapm_widget_invalidate_input_paths() - Invalidate the cached number of input + * paths + * @w: The widget for which to invalidate the cached number of input paths + * + * The function resets the cached number of inputs for the specified widget and + * all widgets that can be reached via outgoing paths from the widget. + * + * This function must be called if the number of input paths for a widget might + * have changed. E.g. if the source state of a widget changes or a path is added + * or activated with the widget as the sink. + */ +static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_dapm_widget *sink; + struct snd_soc_dapm_path *p; + LIST_HEAD(list); + + dapm_assert_locked(w->dapm); + + if (w->inputs == -1) + return; + + w->inputs = -1; + list_add_tail(&w->work_list, &list); + + list_for_each_entry(w, &list, work_list) { + list_for_each_entry(p, &w->sinks, list_source) { + if (p->is_supply || p->weak || !p->connect) + continue; + sink = p->sink; + if (sink->inputs != -1) { + sink->inputs = -1; + list_add_tail(&sink->work_list, &list); + } + } + } +} + +/* + * dapm_widget_invalidate_output_paths() - Invalidate the cached number of + * output paths + * @w: The widget for which to invalidate the cached number of output paths + * + * Resets the cached number of outputs for the specified widget and all widgets + * that can be reached via incoming paths from the widget. + * + * This function must be called if the number of output paths for a widget might + * have changed. E.g. if the sink state of a widget changes or a path is added + * or activated with the widget as the source. + */ +static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_dapm_widget *source; + struct snd_soc_dapm_path *p; + LIST_HEAD(list); + + dapm_assert_locked(w->dapm); + + if (w->outputs == -1) + return; + + w->outputs = -1; + list_add_tail(&w->work_list, &list); + + list_for_each_entry(w, &list, work_list) { + list_for_each_entry(p, &w->sources, list_sink) { + if (p->is_supply || p->weak || !p->connect) + continue; + source = p->source; + if (source->outputs != -1) { + source->outputs = -1; + list_add_tail(&source->work_list, &list); + } + } + } +} + +/* + * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs + * for the widgets connected to a path + * @p: The path to invalidate + * + * Resets the cached number of inputs for the sink of the path and the cached + * number of outputs for the source of the path. + * + * This function must be called when a path is added, removed or the connected + * state changes. + */ +static void dapm_path_invalidate(struct snd_soc_dapm_path *p) +{ + /* + * Weak paths or supply paths do not influence the number of input or + * output paths of their neighbors. + */ + if (p->weak || p->is_supply) + return; + + /* + * The number of connected endpoints is the sum of the number of + * connected endpoints of all neighbors. If a node with 0 connected + * endpoints is either connected or disconnected that sum won't change, + * so there is no need to re-check the path. + */ + if (p->source->inputs != 0) + dapm_widget_invalidate_input_paths(p->sink); + if (p->sink->outputs != 0) + dapm_widget_invalidate_output_paths(p->source); +} + void dapm_mark_endpoints_dirty(struct snd_soc_card *card) { struct snd_soc_dapm_widget *w; @@ -166,8 +276,13 @@ void dapm_mark_endpoints_dirty(struct snd_soc_card *card) mutex_lock(&card->dapm_mutex); list_for_each_entry(w, &card->widgets, list) { - if (w->is_sink || w->is_source) + if (w->is_sink || w->is_source) { dapm_mark_dirty(w, "Rechecking endpoints"); + if (w->is_sink) + dapm_widget_invalidate_output_paths(w); + if (w->is_source) + dapm_widget_invalidate_input_paths(w); + } } mutex_unlock(&card->dapm_mutex); @@ -379,8 +494,6 @@ static void dapm_reset(struct snd_soc_card *card) list_for_each_entry(w, &card->widgets, list) { w->new_power = w->power; w->power_checked = false; - w->inputs = -1; - w->outputs = -1; } } @@ -931,10 +1044,19 @@ int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream, struct snd_soc_dapm_widget_list **list) { struct snd_soc_card *card = dai->card; + struct snd_soc_dapm_widget *w; int paths; mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); - dapm_reset(card); + + /* + * For is_connected_{output,input}_ep fully discover the graph we need + * to reset the cached number of inputs and outputs. + */ + list_for_each_entry(w, &card->widgets, list) { + w->inputs = -1; + w->outputs = -1; + } if (stream == SNDRV_PCM_STREAM_PLAYBACK) paths = is_connected_output_ep(dai->playback_widget, list); @@ -1846,6 +1968,7 @@ static void soc_dapm_connect_path(struct snd_soc_dapm_path *path, path->connect = connect; dapm_mark_dirty(path->source, reason); dapm_mark_dirty(path->sink, reason); + dapm_path_invalidate(path); } /* test and update the power status of a mux widget */ @@ -2084,8 +2207,11 @@ static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm, return -EINVAL; } - if (w->connected != status) + if (w->connected != status) { dapm_mark_dirty(w, "pin configuration"); + dapm_widget_invalidate_input_paths(w); + dapm_widget_invalidate_output_paths(w); + } w->connected = status; if (status == 0) @@ -2267,6 +2393,9 @@ static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm, dapm_mark_dirty(wsource, "Route added"); dapm_mark_dirty(wsink, "Route added"); + if (dapm->card->instantiated && path->connect) + dapm_path_invalidate(path); + return 0; err: kfree(path); @@ -2390,6 +2519,8 @@ static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm, dapm_mark_dirty(wsource, "Route removed"); dapm_mark_dirty(wsink, "Route removed"); + if (path->connect) + dapm_path_invalidate(path); dapm_free_path(path); @@ -3007,6 +3138,9 @@ snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm, INIT_LIST_HEAD(&w->dirty); list_add(&w->list, &dapm->card->widgets); + w->inputs = -1; + w->outputs = -1; + /* machine layer set ups unconnected pins and insertions */ w->connected = 1; return w; @@ -3355,10 +3489,13 @@ static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream, break; } - if (w->id == snd_soc_dapm_dai_in) + if (w->id == snd_soc_dapm_dai_in) { w->is_source = w->active; - else + dapm_widget_invalidate_input_paths(w); + } else { w->is_sink = w->active; + dapm_widget_invalidate_output_paths(w); + } } } @@ -3485,7 +3622,15 @@ int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm, } dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin); - w->connected = 1; + if (!w->connected) { + /* + * w->force does not affect the number of input or output paths, + * so we only have to recheck if w->connected is changed + */ + dapm_widget_invalidate_input_paths(w); + dapm_widget_invalidate_output_paths(w); + w->connected = 1; + } w->force = 1; dapm_mark_dirty(w, "force enable"); |